Dots on my body

I have some strainge dots on my body.
they are not really ichey though.
I am afraind they are caused by much stress and tiredness.
So I visited a doctor.
He said, he does not know what cause them.
I have had them alreay one month now.
I feel tired and even if I take a rest, I can not reciver well.
I think I need to take a trip at least for a week.